Bending a Long Metal Valley

Demonstration of the Wuko 3352 roll bender forming a 13ft length valley piece from coil stock. This tool is fast and efficient at making custom valley lengths because it has a bend depth of 14".
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Hello, I am looking to make a waterproof box, without welding, just by bending sheet metal, do you have a method with your tools? here is what I found, but I am moderately happy with the result, go to "How to Make a Drain Pan with folded corners for Leak Proof pan without need for silicone, solder..." thank you for taking my request into consideration.